/**
 * Cleanup script: remove duplicate stops from the Tuxedo Corn 2026 tour.
 * Keeps the row with the latest created_at per (brand_id, date, city, state, location, time).
 * Run: DATABASE_URL="postgresql://..." npx tsx scripts/cleanup-duplicate-stops.ts
 */
import { Pool } from "pg";

const pool = new Pool({
  connectionString:
    process.env.DATABASE_ADMIN_URL ??
    process.env.DATABASE_URL ??
    "postgres://postgres:postgres@localhost:5432/route_commerce",
});

async function main() {
  const client = await pool.connect();
  try {
    await client.query("BEGIN");

    // Find duplicate groups (same brand_id, date, city, state, location, time)
    const dupes = await client.query(`
      SELECT brand_id::text, date, city, state, location, time, count(*) as cnt, min(created_at::text) as oldest, max(created_at::text) as newest
      FROM stops
      WHERE deleted_at IS NULL
 GROUP BY brand_id, date, city, state, location, time
      HAVING count(*) > 1
      ORDER BY date, city
    `);

    console.log(`Found ${dupes.rowCount} duplicate groups`);
    if (dupes.rowCount === 0) {
      await client.query("COMMIT");
      console.log("No duplicates found.");
      return;
    }

    let totalDeleted = 0;
    for (const row of dupes.rows) {
      // Keep the row with the latest created_at, delete the rest
      const del = await client.query(`
        DELETE FROM stops
        WHERE brand_id = $1
          AND date = $2
          AND city = $3
          AND state = $4
          AND location = $5
          AND time IS NOT DISTINCT FROM $6
          AND deleted_at IS NULL
          AND created_at < (
            SELECT max(created_at) FROM stops s2
            WHERE s2.brand_id = stops.brand_id
              AND s2.date = stops.date
              AND s2.city = stops.city
              AND s2.state = stops.state
              AND s2.location = stops.location
              AND (s2.time IS NOT DISTINCT FROM stops.time)
              AND s2.deleted_at IS NULL
          )
      `, [row.brand_id, row.date, row.city, row.state, row.location, row.time]);
      totalDeleted += del.rowCount ?? 0;
      console.log(`  Deleted ${del.rowCount} duplicate(s) for ${row.city}, ${row.state} on ${row.date}`);
    }

    await client.query("COMMIT");
    console.log(`\nDone. Total duplicates removed: ${totalDeleted}`);
  } catch (e) {
    await client.query("ROLLBACK");
    throw e;
  } finally {
    client.release();
    await pool.end();
  }
}

main().catch((e) => {
  console.error(e);
  process.exit(1);
});